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System Limitations <br />The permanent drains are not intended to convey all the surface water flows through the Bull Seep that <br />are influenced by surrounding land and water uses which are not associated with Aggregate Industries' <br />operations. Consequently, there may be some instances when flooding will occur at the Orr Property. <br />This includes, but is not limited to, turnout flows from the Fulton Ditch, runoff from rainfall events, or <br />flooding from the South Platte River. <br />FEMA Flood Insurance Rate Maps (FIRM) show that the Orr Property may partially inundated during <br />some flood events. The drainage system will hydraulically connect the Orr Property with the future <br />reservoir that is planned for the reclaimed mine. During flooding events on the South Platte River, some <br />floods are expected to enter the future reservoir. As a results, some flooding flows are expected to spill <br />into the Orr Property. <br />Attachments: Calculations <br />Planset <br />P\23514\133-23514-15002\ProjMgmt\Correspondence\Memos\150716_Orr Drain Memo.docx <br />3 Tetra Tech <br />